Table 42: Trastuzumab (Herceptin) for early breast cancer

This summary table contains detailed information about research studies. Summary tables offer an informative look at the science behind many breast cancer guidelines and recommendations. However, they should be viewed with some caution. In order to read and interpret research tables successfully, it is important to understand some key concepts. Learn how to read a research table.

Introduction: About About 10-15 percent of newly diagnosed breast cancers have high amounts of a protein called HER2 on the surface of the cancer cells (called HER2-positive breast cancer or HER2 over-expression) [1].